In the famous tragedy Macbeth, we see how Shakespeare manipulates language and dramatic conventions to show the audience Macbeth’s mental deterioration over the course of his reign as King because of his desire for power and security. One technique commonly used by Shakespeare is the use of Dramatic Irony ( metaphor?). When Macbeth sees an imaginary dagger floating in the air and reaching towards his hand, he takes it as a sign that the murder he is about to commit is the right thing to do. Dramatic Irony is used to show the audience how Macbeth’s mind is imagining things that aren’t truly there.